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This patch make the ABI mechanism available to shared libraries other than Genode's dynamic linker. It thereby allows us to introduce intermediate ABIs at the granularity of shared libraries. This is useful for slow-moving ABIs such as the libc's interface but it will also become handy for the package management. To implement the feature, the build system had to be streamlined a bit. In particular, archive dependencies and shared-lib dependencies are now handled separately, and the global list of 'SHARED_LIBS' is no more. Now, the variable with the same name holds the per-target list of shared libraries used by the target.
This directory contains the build system. In consists mainly of makefile templates for different directory roles. :'global.mk': This file contains global variables, for example the definitions of the tools to use. :'generic.mk': Generic rules for creating file types from others. :'prg.mk': This file represents the target binary role of a directory. It must be included by all makefiles that build programs. :'lib.mk': This file represents a library role. It is never used from within the 'src/' directory but only from the <libname>.mk files in 'lib/mk/'.